A in your body B without water C before long D for a change E on a busy day F to your weight One cannot live______.

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问题 A in your body
B without water
C before long
D for a change
E on a busy day
F to your weight
One cannot live______.

选项

答案B

解析由第一段“Our bodies are estimated to be about 60％to 70％water．Blood is mostlywater”可知，人体约60％～70％是由水组成的，而且人体自身的新陈代谢和机体的运行都离不开水，因此人离开水是活不下去的，故选B.

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